Using the serial port, Serial data example – Rockwell Automation 2706 DL20 SERIES G USER MANUAL User Manual
Page 69
Chapter 6
The Serial Port
6–4
Serial Data Example
Here is an example of a message containing variables, which is triggered
using the serial link. The example message (number 4) is:
Voltage =
↑
, current =
↑
To trigger this message, the following strings are sent:
ASCII
(Ctrl V)
4
1
6
0
[Return]
Decimal Equivalent:
22
52
49
54
48
13
Hex Equivalent:
16
34
31
36
30
0D
Octal Equivalent:
26
64
61
66
60
15
This queues up 4160 as the “voltage” value.
ASCII
(Ctrl V)
1
2
0
0
[Return]
Decimal Equivalent:
22
49
50
48
48
13
Hex Equivalent:
16
31
32
30
30
0D
Octal Equivalent:
26
61
62
60
60
15
This queues up 1200 as the “current” value.
ASCII
(Ctrl T)
4
[Return]
Decimal Equivalent:
20
52
13
Hex Equivalent:
14
34
0D
Octal Equivalent:
24
64
15
This queues up a trigger for message number 4, which causes this message to
be displayed:
Voltage = 4160, Current = 1200
Note: Don’t forget that the DL20 must be set up for BINARY MSG & VAR
DATA of the parallel port options for serial port queuing to work. This is
selected from the special functions menu.
Using the Serial Port